Async/Await Task Call in Property Change Event

Hi all,

In our sample application we need to call the Async/Await function when the property is changed.

For Example, when we type a character in Xamarin.Forms.Labs.Autocomplete control, we need to call WCF REST Service to fetch data against the typed character.

Note: The below is working fine with Android&iOS but fails to wait for Async/Await call for Property in Windows Phone.

Please find the sample code and suggest .

public string _getsearchtext { get; private set; }
        public string SearchText
        {
            set
            {
                if (_getsearchtext != value)
                {
                    _getsearchtext = value;
                    this.OnPropertyChanged("SearchText");
                    if (_getsearchtext + "" != "")                    
                       LoadSite();                    
                }
            }
            get { return _getsearchtext; }
        }

public async Task LoadSite()
        {
            try
            {
                object[] Parameters = new object[2];
                Parameters[0] =UserCode;
                Parameters[1] = _getsearchtext;
                if (_dataaccess == null)
                    _dataaccess = new DataAccess();
                List_site = await _dataaccess.GetUsersite(Parameters);   // When this line executed Android&iOS waits for result and process data, but windows phone executes next line without waiting for Asyn/await. 
                itemsList = new ObservableCollection<HelpDesk>(List_site);
                Items = new ObservableCollection<Object>();
                for (var i = 0; i < itemsList.Count; i++)
                {
                    Items.Add(new TestPerson(string.Format(itemsList[i].Description + ""), string.Format(itemsList[i].HD_Equipment + ""), Convert.ToInt16(itemsList[i].HD_Code + "")));
                }
            }
            catch (Exception ex)
                Debug.WriteLine(ex.Message.ToString());
        }